Articles tagged with Dielectrics
Researchers have found a new method to induce the piezoelectric effect in materials that are otherwise not piezoelectric. This breakthrough could lead to the development of biocompatible materials with properties similar to common lead-containing materials, and has the potential to expand the design of new electromechanical devices.
Researchers have discovered that altering the interface between two materials in time can lead to new opportunities for wave manipulation. This breakthrough enables novel concepts and applications in photonics, including nonreciprocal gain, power steering, and optical drag.
Scientists found that amorphous carbon coatings used to protect optical fibers from moisture can break down due to interaction with water molecules. The coating's thickness increases, leading to an irreversible increase in electrical resistance and a decrease in transparency.
Kazan Federal University researchers designed a unique dielectric cell to study gas hydrate formation and decomposition under pressure. The device's effectiveness was demonstrated, allowing for further investigation of hydrate inhibitors.
Researchers investigated methylammonium lead iodide's ferroelectric nature and photovoltaic properties, finding a freezing temperature of 270 K and a novel phase diagram. The study advances perovskite's potential for energy conversion and storage applications.
Researchers developed electrically-driven soft valves to control hydraulic soft actuators, enabling faster and more powerful control of macro- and small-scale hydraulic actuators. The breakthrough allows for unprecedented motion control of soft robots with internal volume ranging from hundreds of microliters to tens of milliliters.
Osaka University researchers have created an adhesive-free method to strongly combine copper foil with polytetrafluoroethylene (PTFE), reducing transmission losses in electronic circuits. The heat-assisted plasma treatment technique improves adhesion strength without adding intermediate layers.
Quantum engineers at the University of New South Wales have discovered a new technique to control millions of spin qubits, a critical step towards building a practical quantum computer. This breakthrough uses a novel component called a dielectric resonator to focus microwave power and deliver uniform magnetic fields across the chip.
Researchers inverted lunar regolith parameters using microwave radiation data from the Chang'e lunar sounder. The study reveals regolith thickness distribution and provides support for selecting sampling sites for future missions.
Researchers propose a new model that takes into account spatial and energy disorder in disordered media. The model provides relationships between the parameters of the dielectric function and the microscopic structure of the medium, enabling the extraction of valuable information about structural and dynamic processes.
Researchers from Tomsk Polytechnic University and Spanish universities have developed a simple method to boost the responsivity of terahertz radiation detectors by 3.5 times using a small Teflon cube. This enhancement enables more precise measurements without changing the detector's design.
Researchers at Saarland University are developing soft robotic tools with smart polymeric materials for flexibility and sensitivity. These systems can mimic human movements and interact with humans in a safe and harmonious way.
Researchers at North Carolina State University developed an e-textile material using inkjet printing, creating a durable and flexible wearable device that can conduct electricity. The study's findings suggest a simpler method for manufacturing electronic textiles.
Researchers at the University of Innsbruck develop new method to assess influence of dielectric materials on charged particles in ion traps, enabling more accurate design and minimization of noise in quantum computers. The breakthrough improves understanding of sources of error in ion trap quantum computing.
Researchers at TU Dresden and TU Munich developed a novel method to engineer the energy gap in organic semiconductors by blending materials with varying molecular shapes. This approach enables continuous tunability of the energy gap, paving the way for efficient optoelectronic devices.
Researchers developed a machine learning technique to speed up microscopic cell analysis, reducing processing time from months to just seconds. The new approach uses neural networks to create detailed maps of cell composition without disrupting the cells, enabling rapid label-free biochemical composition mapping.
Researchers at the University of Pittsburgh have developed a new class of self-aware metamaterials that can sense pressure, stresses, and generate power. These materials are scalable, efficient, and can be used in various civil, aerospace, and biomedical engineering applications.
Researchers found that engineered defects in oxide crystals can increase electrical performance by five-fold and 19-fold in dielectric and piezoelectric properties, respectively. This breakthrough could lead to the development of more efficient capacitors with improved environmental and health benefits.
A team from Kazan Federal University and King's College London has developed a thermoplasmonic sensor that can detect phase transitions in nanoscale materials with high sensitivity. The sensor uses metallic nanoantennas to heat up the material, allowing for the detection of changes in its properties.
Researchers developed a highly linear flexible pressure sensor with high sensitivity using soft micropillared electrodes, achieving linearity of up to 0.999 and sensitivity of 33.16 kPa-1 over a wide pressure range. The sensor has applications in intelligent robots, human-computer interaction, and health monitoring.
A research team developed a straightforward method to find high-Q modes in single dielectric nanocavities. They discovered high-Q modes using Mie mode engineering and avoided crossing, resulting in improved photonic device performance and applications.
A multidisciplinary team of researchers has developed a new class of material with the potential to keep chips cool as they shrink in size, helping to meet the requirements of miniaturizing transistors on dense chips. The material has both low electrical conductivity and high heat transfer capability.
Researchers have developed a novel graphene-based electro-absorption modulator with improved static and dynamic modulation efficiency. The device operates at high-speeds while maintaining low power consumption, achieving a record-breaking 39GHz bandwidth.
Skoltech scientists found that nuclear quantum effects play a significant role in the polarization of alcohols in an external electric field. They discovered that tunneling of excess protons forms intermolecular dipoles with proton-holes, determining dielectric response from dc to THz.
Scientists have designed a zero-index material based on a purely dielectric photonic crystal slab that supports low-order mode-based design, reducing radiation loss. This design enables applications such as arbitrarily shaped waveguides, phase-mismatch-free nonlinear propagation, and extended super radiance with low propagation loss.
David Wetz, UTA professor of electrical engineering, has received a DURIP grant to study the insulation properties of epoxy and additively manufactured materials in compact high-voltage systems. The goal is to identify new ways to improve dielectric properties, reducing system size and weight.
Scientists discovered a new kind of hidden symmetry in photonic crystals, leading to the emergence of triply degenerate nexus points that behave like magnetic monopoles. These nexus points enable unusual photonic band connectivities and novel transport phenomena, including spin-1 conical dispersion and canonical diffraction.
Researchers create a device that displays directionally asymmetric reflective colors based on viewing direction, enabling information encryption via optical camouflage. The design allows for bidirectional display of tuneable messages/images, opening up new photonic applications.
Researchers have developed a new method for two-dimensional optical spatial differentiation, enabling efficient broadband imaging with high contrast. The proposed dielectric metasurface device outperforms current methods in efficiency, compactness, and power consumption.
David Wetz at UTA is working with the Navy to study dielectric insulation properties of epoxy and additively manufactured materials. The goal is to improve their insulation properties in compact high-voltage systems, potentially reducing overall system size and weight.
A group of Russian scientists, including ITMO University researchers, has proposed a system to update existing MRI scanners. The device uses electromagnetic coupling with an additional dielectric resonator to localize the magnetic field in the breast.
Researchers created a three-layer anti-reflection surface to improve transparency and conductivity in plastic, achieving a transmittance of 88.4% compared to 88.1% for the plastic alone.
Researchers developed a liquid crystal integrated metalens that can achieve both achromatic and chromatic focusing with a single device. The design overcomes the challenge of chromatic aberration, allowing for improved resolution in full-color and hyperspectral imaging.
New radar findings suggest the Moon's subsurface is richer in metals like iron and titanium than previously believed. The research uses dielectric properties to locate metal oxides in lunar soil, revealing a steady increase in concentration with crater size.
Physicists from Max Born Institute and University of Rostock discover light-induced tunneling of electrons in dielectrics, creating a nonlinear current that dominates bright bursts of light. This finding expands fundamental understanding of optical non-linearity and its applications in information processing and material processing.
Researchers developed a novel material that enables major leaps in electronic device miniaturization. The ultrathin boron nitride film boasts an extremely low dielectric constant and high breakdown voltage, making it attractive for practical electronic applications.
A new study successfully demonstrates the synthesis of ultrathin amorphous boron nitride films with extremely low dielectric constants, high breakdown voltages, and superior metal barrier properties. These materials have great potential as interconnect insulators in next-generation electronic circuits.
Researchers from National University of Singapore developed a new stretchable material called HELIOS that can store more electronic charges at lower voltages, enabling higher brightness and longer operating lifetime. The material has self-healing properties, allowing it to repair itself under ambient environmental conditions.
Researchers at MIT have discovered a new phenomenon that enables the controlled movement of tiny particles in suspension, analogous to the swerving of a curveball. This electrokinetic effect could lead to new ways of performing industrial or medical processes that require separation of suspended nanomaterials.
Researchers developed a quantum photonics prototype using hyperbolic metamaterials to achieve high-efficiency single-photon sources with broad spectral bandwidth. The tilted geometry suppresses light reflections, enabling faster photon extraction and paving the way for on-chip quantum networks.
Researchers at Penn State have developed a method to improve the efficiency and heat tolerance of devices, including electric cars, drills, and grids. By altering dielectric capacitors with engineered materials, they increased storage capacity while also increasing electric charge efficiency.
Scientists at Rice University successfully grew atom-thick sheets of hexagonal boron nitride, a wide band gap semiconductor, to create perfectly ordered crystals for use in integrated circuits. The breakthrough enables the development of 2D layers with millions of transistors, potentially overcoming limitations in miniaturization.
Researchers have produced barium titanate ceramics using cold sintering at record low temperatures, achieving high quality without the need for secondary heating. This breakthrough could lead to more efficient manufacturing and reduced environmental impacts.
Lobachevsky University scientists create a new variant of the metal-oxide memristive device that holds promise for use in RRAM and novel computing systems, including neuromorphic ones. The optimized structure stabilizes resistive switching between nonlinear resistive states, enabling robust switching and low variation of resistive states.
Researchers manipulate ferroelectric domain walls in bismuth ferrite thin films using piezoresponse microscope, achieving oriented growth and configuration control. The study provides a generalizable approach for DW dynamic studies and advanced tunability of conductive DWs.
A new type of metalens made from a dielectric-metal composite film can overcome diffraction limits, paving the way for high-resolution nanoscale optical technologies and sensors. The ultra-high resolution is achieved through an unusual behavior of the material in optical and infrared ranges.
Physicists have discovered that an existing technique is more accurate in explaining the 'critical temperature' of superconductivity in pure, single-layer graphene. This finding has significant implications for understanding graphene's diverse structural properties and potentially aiding the development of new technologies.
A team of physicists has discovered a quadruple potential well in ferroelectric copper indium thiophosphate (CIPS), increasing the number of options in ferroelectric switching. This finding could lead to new operations and applications in data storage and electronics.
Researchers developed a scalable method to grow orthorhombic molybdenum oxide (α-MoO3) nanosheets on graphene substrates using van der Waals epitaxial growth. The nanosheets retain bulk-like structural and electrical properties even at thicknesses of 2-3 layers, making them suitable for optoelectronic devices and power electronics.
Researchers have developed a stretchable light-emitting device that operates at low voltages and is safe for human skin. The device can be used in smart wearables, soft robotics, and human-machine interfaces.
The study uses a unique processing technique to create a polymer film capacitor with record-high energy density, promising a step change in the field of dielectric capacitors. This innovation could enable efficient and low-cost electric energy storage systems for intermittent renewable energy sources.
Researchers have developed a method to transfer information using surface plasmon polaritons (SPPs), enabling faster signal propagation in microelectronic chips. The technique, which uses multiple snapshots of electromagnetic fields, can potentially solve the problem of shrinking electronic components and improve the speed of chips.
Duke University engineers used machine learning to design dielectric metamaterials that absorb and emit specific frequencies of terahertz radiation, reducing calculation time from over 2,000 years to just 23 hours. The new designs enable thermophotovoltaic devices that convert waste heat to electricity with higher efficiency.
New optical security features use a two-piece metamaterial system to create difficult-to-replicate optical phenomena, making it harder to counterfeit money or intercept secure information. The approach offers improved forgery protection and can be used for various applications, including banknotes and identification cards.
Scientists from Tomsk Polytechnic University have developed a concept for an 'optical vacuum cleaner' that can manipulate and capture nanoparticles using optical properties. This technology has the potential to improve air purification in lab-on-a-chip operations and clean rooms.
Researchers proposed a new type of plasmonic surface lattice resonance (SLR) supported by metal-insulator-metal arrays, which exhibit higher quality factors in less symmetric dielectric environments. This allows for diverse applications, including ultrasensitive sensing and nanolasers.
A nanocomposite combining polymer nanofibers and boron nitride nanosheets offers high strength and superior thermal conduction, allowing it to withstand harsh environments. The material acts as an effective heat sink up to 250 degrees Celsius.
Researchers from Ural Federal University and the National Academy of Sciences of Belarus are working on a two-year project to develop new materials with improved piezoelectric properties. The goal is to create lead-free multifunctional materials for various electromechanical devices.
Researchers at EPFL have developed a method to create dielectric glass metasurfaces in just a few minutes, using dewetting to produce flexible and ultra-thin photonic circuits. This breakthrough enables the creation of highly sensitive sensors and flexible optics for various applications.
Researchers at the University of Exeter have developed a new technique to embed high-K dielectrics into van der Waals heterostructures, allowing for improved performance and added functionalities. This innovation paves the way for a new generation of flexible electronic components.